package com.rd.student.jiaji.class4.suyan.zrrd.day13;

public class SystemTest {
    public static void main(String[] args) {
        long current= System.currentTimeMillis();
        System.out.println(System.getProperty("java.version"));
        System.out.println(System.getProperty("os.name"));
        System.out.println(System.getProperty("os.version"));
        System.out.println(System.getProperty("user.name"));
        System.out.println(System.getProperty("user.dir"));

       for (int i=0;i<1000;i++){
           System.out.println(i);
       }
       System.exit(0);
     long time =System.currentTimeMillis() - current;
        System.out.println(time);//
    }
}